Practice question
Question
What is the mass of FeCl₂ produced when 11.2 g of Fe reacts with excess HCl? (Molar masses: Fe = 56 g/mol, FeCl₂ = 126.5 g/mol)
Explanation
Reaction: Fe + 2HCl → FeCl₂ + H₂. Moles of Fe = 11.2/56 = 0.2 mol. 1 mol Fe produces 1 mol FeCl₂; mass = 0.2 × 126.5 = 25.3 g.
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